The New Jersey Water Supply Authority, the public entity that oversees the Delaware & Raritan Canal, hopes to curb the growth of Hydrilla, an “invasive aquatic weed” whose presence could affect 1.5 million Central Jersey residents’ drinking water, according to the city.

Iowa: Curlyleaf pondweed threatens to jam boat lifts, entangle propellers and plug motors once again in 2017. The East Okoboji Lakes Improvement Corporation, the city of Orleans and the Iowa Department of Natural Resources are partnering to reduce that difficulty by cutting paths through dense patches of the weed on East Lake Okoboji.